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Which option gives the correct difference between dew and fog?

Answer and explanation

Correct answer: Dew forms as droplets on surface and fog as tiny droplets in air

Direct answer: B. Both dew and fog are forms of condensation, but their locations differ. When a surface cools sufficiently, water vapour can condense directly onto grass, leaves, vehicles or other surfaces as liquid droplets; this is dew. Fog consists of very small water droplets suspended in air close to the ground, reducing visibility. A reverses the definitions, so it is wrong. B is correct because it identifies dew as surface droplets and fog as suspended droplets. C is wrong because ordinary dew and fog are not only ice crystals; they commonly contain liquid water droplets, although freezing conditions can produce frost or frozen particles. D is wrong because condensation is the common process behind both. Memory cue: dew is ‘down’ on a surface, while fog ‘floats’ in near-ground air.

Related tags

GeographyDewFogCondensationForms Of Condensation: DewFrostAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereClass 12 Mcq

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